Interlocking device for elevators



Jan. 3l, 1928.

J. J. FOGARTY INTERLOCKING DEVICE FOR ELEVATORS Filed Jan. so. 192e;L

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J. J. FOGARTY INTERLOCKING DEVICE FOR ELEVATORS Filed Jan. 50. 1926Patented Jan. 31, 1928.

UNITED STATES JOHN J. `rosemary, or rrr,ILnnnLrma,Y rnivnsrnvnivra,fissronon .ro .JENKINS INrnRLoor; MANUFACTURING COMPANY, oFrHrLAnELPHrA,PENNSYLVANIM 4 CORPORATION 0F PENNSYLVANIA.

INTERLOCKING DEVICE FOR ELEVATOBS.

yApplication filed January 30, 1926. Serial No. 84,835.

My invention relates to an improvement in interlocking devices forelevators.

Heretofore it has been known to provide interlocking devices forelevators o such a nature that no one ofthe shaft-doors can be openeduntil the elevator car is at the level of a door; and upon the openingof a door, the elevator carannot be moved until the door is againGlOSed- "Various mechanisms have been developed for acomplishin thispurpose and -such mechanisms usuay otmupriseV shoes at the landings anda shoe carried by the car, which when the-car is stopped at a landing,engages the landing shoe. The landing shoe and related mechanism areconnected to the landingfdoors in such a manner that the doors Vcannotbe opened unless the landing shoe is engaged by the carshoe, and uponthe open` ing of the door, the landing shoe isl advanced causingrthe carshoe to be retracted. The car shoe is so connected to the car controlkmechanism that when it -is retracted the car controller will be locked,or if the elevator be operated by electricity, a. cut out switch will bethrown.

Such mechanisms are usually7 applied to elevator installations havingsliding doors and in which the doors are relatively close to the insideofthe shaft,.and in such installations the usual interlock mechanismsprove quite satisfactory. However, in installations where the landingdoors are swung on hinges and morey especially where the doors arepositioned substantially back from the inside of the shaft, the knownmechanisms are found to be not entirely satisfactory. f

New, it is the object of'my invention to provide an improvedinterlocking mecha nism of the oharacterindicated, which will beadaptable for application to hinged doors and to doors which `arepositioned atsubstantial distance fromthe inside of the shaft.

Having now indicated in a general way the nature and purpose of myinvention, I

will proceed to a detailed description thereof v with reference to theaccompanying drawm 'it is inl its normal forward position. in which ingsin which there is illustrated a preferred embodimentand in which Fig. lis a. partial viewfrom inside of a shalt or' an elevator door equippedwith an interlock embodying my invention. l Fig. 2 "s a sectional Viewtaken atright 5 angles to Figure 1. i

Fig. 8 is a horizontal sectionalview showthe interlock embodyingmyinvention, in plan.

Fig. t is an enlarged sectional-elevation looking from the leftligure f1showingthe interlock embodying my invention with `the door in openposition.

' Fig. 5,'is a View similar to that of Figure lwith the door closed, butunlocked.

Fig. 6, is a view similar to that of Figure 4 with the door closed andlocked. In the several lfigures a indicatesa view of an elevator shaft,provided with `a landing The landing is of substantial depth and isclosed by means `of a doorvc swung on hinges d. The floor of theelevator car, adapted to be operated in the shaftis indicated at e.

On the wall of the shaft, just beneath the level'of'the landing, issecured a plate f, from `which extends a ping upon which1 1s rotatablymounted a disc h having thereon a cam surface andprovided with a'radialslot 17'. The disc 71, is held forward normallyv against the head of thepin gby means of a spring la. Beneath the disc k is mounted a stop mispaced from the plate and inline with a lug n carried by thedisc,fwl1endisc position it is prevented from rotating.

The door c is provided with a vertical locking bolt ov retained by aguide -p and raised and'lowered for engagement with'and disengagementfrom asocketj/ in. the laud- V ing by means of a lever r vmounted on thedoor and connected with lthe bolt. A rod s is 'rotatably mounted inbearings t on the landing'and is provided at one-engl with an arm uprovided with a lateral hole u for the reception of a pin w extendinglaterally through the bolt o adjacent to the lower end. The rear end ofpin w serves as a stop to limit the upper' position of the holti. Theopposite end of rod s is bent around to form an arm a which is enteredin the radial slot j in disc L. A spring Z embraces rod s and is securedat one end to the rod and at the other to one of the bearings t. Thespring tends to retain the arm 1n position for reception of pin w Whilethe door is open.

Pivoted toplate f is a lever y, one end ot' which carries a shoe and isheld against the cam surface i by means ot a spring 2 positioned betweenplate f and its other end.

Beneath the car floor e is slidably mounted a rod I5 carrying on itsforward end a shoe 4 and connected at its rear end to one end Lof apivoted lever 5, the other end of' which is acted on by a spring (i,which tends to advance the shoe 4.

The lever 5 engages the spring-pressed movable member 7 of a sn'itch 8adapted to connect and disconnect the operating current of the elevatorcar.

In operation, assuming the door to be closed and locked the parts willbe in the position shown in Figure 6 and if the car be not atthelanding, the rod e, Which is connected to bolt o, through pin lw and armu, and to disc /L through engagement of arm :z: in slot j, cannot beturned, since disc h cannot be rotated due to stop m in the path ofwhich lug n lies because of the forward position of disc /i under theinfluence of spring c. Hence the bolt cannot be raised out of socketV gand the door cannot be opened.

If now the car be brought up' to the level of the landing, shoe 4engages shoe z and if leverv r be turned, rod s will turn and throughthe engagement of arm a: with disc z, the disc will turn, and sincelever g/ is held through the engagement of shoe .a by shoe 4 the camsurface will act against lever 1/ and the disc will be pressed backwardagainst the action of spring permitting lug n to pass behind stopm, asshown in Figure 4. In the further advance of the cam surface c', thelever je/ and the shoe zivill be advanced and shoe 4 will be retractedthereby turning lever 5 against the action of spring 6 and actuating themember 7 to cut otl' the operating current.v

On reclosing of the door the parts reverse their operation and lever -isturned by its spring 6 advancing shoe 4 Iand permitting member 7 to beactuated by its spring to' connect the actuating current'.

It is understood that my invention is not limited to the particularmechanism indicated and that itV may be utilized in connection withvarious interlocking mechanism such for example as lock a controller orother mechanism of an elevato' as well as for operating a cut olf switchsuch as described above.

I claim:

1. In an interlock for elevators the combination with a shaft, a landingand a ear, of a landing door spaced from the interior of the shaft".interlocking mechanism on the car and shaft, adjacent the landing` alocking bolt for securing thc door, a rod rotatably mounted on thelanding and having an arm formed at one en-:l and engaged with theinterlocking mechanism on the shaft, the other end of' said rod beingadapted to be engaged with said bolt when the landing door is closedwhereby when the interlockingY mech anism on the shaft is engaged by theinterlocking mechanism on the car, said rofl may be rotated,pern'litting operation of the bolt and when said mechanisms aredisengaged said rod is held from rotation by the interlocking meclmnifimon the shaft and operation of said bolt is prevented.

Q. In an interlock for elevators the combination with a shaft, a landingand a car, of a landing door spaced from the interior of the shaft,interlocking mechanism on the car and shaft', adjacent the landing, alocking` mechanism carried hy the door and means engaged with theinterlocking mechanism on the shaft and adapted to engage with saidlocking mechanism when the landing door is closed whereby when theinterlocking mechanism on the shaft is engaged by they interlockingmechanism on the car, the locking mechanism may he operated and when theinterlocking mechanisms are dis* engaged the locking mechanism may nothe operated.

3. In an interlock Vfor elevators the coinbination with a shaft alanding and a car, of a stvingably mounted landing door spaced from theinterior of the shaft, interlocking mechanism on the car and in theshaft adjacent the landing. a. locking holt for securing the door, a rodon the landing engaged with the interlocking mechanism on the shaft: andadapted to engage with said lockingbolt when the landing door is closedwhereby when the interlocking mcchanisiu in the shaft is engaged by theinterlocking mechanism on the car the locking holt' may be operated andwhen the said interlocking mechanisms are disengaged the holt may not beoperated.`

In testimony ol'f which invention, l have hereunto set my hand, i atPhiladelphia, Penna., on' this 29th day of January, 1926.

JOHN J. FOGARTY.

lroo

